One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,7)(6,8)(9,10,13,15)(11,14,12,16)(17,18)(19,27)(20,25)(21,24)(22,26)(23,30)(28,36)(29,40)(31,42)(32,37)(33,38)(34,41)(35,39)(43,46)(44,48)(45,47)(1,3)(2,6)(4,7)(5,8)(9,11,13,12)(10,14,15,16)(17,19,21,30)(18,23,24,27)(20,32,33,29)(22,28,35,31)(25,40,38,37)(26,42,39,36)(34,44,45,43)(41,46,47,48)(9,12,13,11)(10,14,15,16)(18,24)(19,28)(22,35)(23,36)(25,38)(27,42)(29,43)(30,31)(32,44)(34,45)(37,46)(40,48)(2,7)(3,8)(10,15)(14,16)(17,20,21,33)(18,25,24,38)(19,29,30,32)(22,34,35,45)(23,37,27,40)(26,41,39,47)(28,43,31,44)(36,46,42,48)(1,4,5,6)(2,3,7,8)(19,30)(20,33)(23,27)(25,38)(28,31)(34,45)(36,42)(41,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.